Is it possible to get a positive after a negative on 12dpo?

The internet says a lot about how anything before 14dpo is too early to test but 1)it seems like so many women get their positives way before 14dpo and 2)so many tests are sensitive enough to pick up a positive before 14dpo. I took an early detection test today (I’m 12dpo and period due in 2 days) and it was negative. But the internet talks about how 12dpo could be too early, hcg levels may be too low, implantation may have just occurred, etc, but also that slightly concerns me because I’ve heard a lot about how late implantation increases risk of miscarriage! So not getting a positive by 12dpo makes me scared to even get a positive later. Can someone please just tell me what’s actually normal please! Wracking my brain! (I’m an overthinker😭)